Micrometer attachment for measuring-tools.



PATENTED JAN. 28, 1908.

G. KOFFSKEY. MICROMETER ATTACHMENT FOR MEASURING TOOLS.

APPLICATION FILED SEPT. 7, 1907.

INVENTOI? George lfoffske y.

ATTOHNEYO WITNESSES UNITED STATES PATENT OFFICES v,

GEORGE KoFFsK Y, or NEW-ORLEANS, LOUISIANA.

monomn'rnn ATTACHMENT FoeMnAsumNe-rooL-s.

Specification of Letters Patent.

Patented Jan. 28. 1908,

Application filed $eptember .7. 1907 Serial No. 391.795-

To all whom it mcy concern: Be it known that I, Gnonen Korrsxnr, a" citizen of the United States, and a resident of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and Improved Micrometer Attachment for Measuring-Tools, of which the following is a full, clear, and exact description. I

7 The object of the invention is to-provide a new and improved micrometer attachment for measuring tools, such {as inside calipers,

outside calipers, measuring rods and other measuring tools, and arranged to enable the user of the tool to accurately set the same to a desired measurement.

The invention consists of novel features and parts and combinations; of the same, which will be more fully described hereinafter and then pointed out in the claims.

A 'practical embodiment of'the invention is represented in, the accom anying drawings forming a part of this specification, in which .s imilar characters of reference indicate correslponding parts in all the views. 4 igure 1 is a side elevation of the improvement as applied teen-outside caliper; Fig. 2 is a like view of the improvement as applied to a measuring rod; Fig. 3 is a sectional side elevation of the improvement as applied to an inside caliper, and Fig.. 4 is a cross section of the improvement-onthe line 4-'4 of Fig. 2.

The frame-supporting member A of the micrometer is provided'with as lit hub B having an interior screw three in whichscrews the screw rod C carryingthe thimble D extending over the hub B in the usual manner. The thimble D and the hub B are provided with the usual graduations forindica'ting a desired measurement. A clamp-;

ing screw E engages the split hub B, so as to.

securely clamp the hub B on the screw rod C after the thimble D is adjusted, to indicate the desired measurement. The free end of the .thimble ,D terminates in a contactingknob screw the miccometer attachment imposition on the-said member G.

Now by reference to Fig. lit will be seen that the knob D extends towards the free end of theother member G of the caliper G,

and by adjusting the thimble D the part H can be accurately measured, as the knob D point, as will be readily understocd by reference to Fig. 1.

As illustrated in F ig. 2 the clamping bolt F is engaged. with one end of the measurin rod I,so thatthe other end of the rodl forms one contact or measuring point, while the knob D forms the other contact or measuring point, to allow of convenientlymeasuringv the distance; between thepoints a and b.

As indicated in'Fig; 3 the clampingbolt F to 'forms'one contact point and theldree end of the member G forms the other Contact is connected with the member J of anout- ,side' caliper J, and in this case themicrometer attachment extendsoutwardly away;

from the free end of the other member'J of the caliper J. Thus by the arrangement described the article K can be calipered 'at its "inside, and proper adjustment'or setting of the micrometer is had by turning .the thimble D in the usual manner.- 3

The micrometer attachment is very simple and durable in construction and can .be readily attached to or detached from an inside or outside caliper, measuring rod or other measuring tool.

Havingthus described my invention, I claim a's'new and desire to secure by Letters Patent i 1. A micrometer attachment, comprising a sup ortin' fnember having an interiorly threa edsjpllthub', ,a rod'threaded into the hub, athimble carried by the rod and extendin'giover the hub, theiree end of said thimble being provided with a contact knob, said 'thimbleand hub". being provided with clamping screw-engagingthe; split hub to clamp the'hub on therod and a' clamping bolt onthe supporting member-for securing the attachment to'the'measuring tool.

I 2: A micrometer attachmenhcom prisin a sup orting member having a'hub, a re threa ed into the hub, a thimble carried by the rod and extending over thehub, thelfree graduations for-the purpose set forth, a

-end of the thimble being profided with a.

memberfor securing the attaclnnentto the 'measuring tool.

gal 577,846. y

In testimony Where'of-I have signed,my name to this specification in'the nresence of two subscribing witnesses. .t u

. .PGEORGE 'KOFFSKEY.

Witnessesz,

contact knob, said thimble and hub beingprovided with graduations for the purpose set forth, means for clamping the hub on the rod, and a clamping bolt on the supporting 

